Yong’in eshiklarining yong’indan himoya qilish vaqti 60/90/120 min. Yong’in eshiklari odatda yog’och yong’inga qarshi eshiklar, po’latdan yasalgan yong’in eshiklari, zanglamaydigan po’latdan yasalgan yong’in eshiklari, yong’inga qarshi shisha eshiklar va yong’inga kirish eshiklari bo’ladi, ular yog’och, po’lat yoki boshqa materiallar bo’ladimi. Uchta A, B va C darajalari mavjud.

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